package cn.tedu.v3;

import java.io.*;
import java.net.BindException;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.util.Scanner;

/**
 * 多人聊天室   Version 3
 * Server服务器：找到CS多线程类
 *   1.读入放入线程中
 *   2.写出直接写在run方法
 */


public class Server {
    private ServerSocket serverSocket;
    BufferedReader br=null;
    public Server(){
        try {
            serverSocket=new ServerSocket(6666);
        } catch (BindException e){
            System.out.println("请检查端口号，被占用");
        }
        catch (IOException e) {
            e.printStackTrace();
        }
    }
    public void start(){
        Socket socket=null;
        String ip=null;
        try {
            while(true) {
                System.out.println("等待客户端链接");
                socket = serverSocket.accept();
                new Thread(new CS(socket)).start();
            }
        } catch (IOException e) {
            System.out.println(ip+"客户端链接失效了");
        } finally {

            if(serverSocket!=null&&!serverSocket.isClosed()){
                try {
                    serverSocket.close();
                } catch (IOException e) {
                    System.out.println("服务器关闭失败~~~");
                }
                System.out.println("服务器关闭成功~~Over");
            }
        }
    }

    public static void main(String[] args){
        Server server=new Server();
        server.start();
    }
//CS多线程类：控制客户端发来的通讯消息
    private class CS implements Runnable{
        private Socket socket;
        private String ip;

        public CS(Socket s){
            this.socket=s;

         ip=socket.getInetAddress().getHostAddress();

        }

        public void run() {
            //输入流--读入功能：存入线程中
            PrintWriter pw=null;
            //BufferedReader br=null;
            try {
                //1.1写出操作
                pw = new PrintWriter( new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(), "UTF8")), true);
                //1.2读入操作
                 BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF8"));
                    new Thread (()->{
                        try {
                            String message;
                            while ((message= br.readLine())!=null) {   //读入客户端
                                System.out.println(ip+"客户端说：" + message);
                                //1.6增加一句--每次客户端发给服务器内容
                                System.out.println("服务器请输入：");
                                    }
                        } catch (IOException e) {
                            System.out.println("客户端发来的消息断开了~");
                        }
                    }).start();
            //1.5增加写出操作【修改目的：读入写出通顺】
            //1.5.1   控制台卡住---输入内容
            Scanner input=new Scanner(System.in);
            //1.5.2一直写出
             while(true){
                 System.out.println("服务器请输入：");
                 String sme=input.nextLine();
                 pw.println("服务器说："+sme);
             }

            } catch (UnsupportedEncodingException e) {
                System.out.println("请检查客户端与服务器端编码集不一致");
            } catch (SocketException e) {
                System.out.println("客户端链接被重置");
            } catch (IOException e) {
                System.out.println("客户端链接失效了");
            } finally {
                /*if (br != null)
                    try {
                        br.close();
                    } catch (IOException e) {
                        System.out.println("读入流断开链接~");
                    }*/

                if(socket!=null&&!socket.isClosed()){
                    System.out.println(ip+"客户端退出服务器链接~");
                    try {
                        socket.close();
                    } catch (IOException e) {
                        System.out.println(ip+"客户端退出连接异常~");
                    }
                }
              }
            }
        }
  }
